import turtle as t
import random

screen = t.Screen()
screen.setup(800, 800)
pen = t.Turtle()
pen.pensize(10)
pen.speed(0)
colors =["red","blue","green","black","gold","yellow"]

for j in range(36):
    for i in range(4):
        pen.color(colors[random.randint(0, len(colors) - 1)])
        pen.forward(150)
        pen.left(90)
    pen.right(10)
t.done()
